CN1598364A

CN1598364A - Hydraulic control system of a six-speed automatic transmission

Info

Publication number: CN1598364A
Application number: CNA200310123817XA
Authority: CN
Inventors: 朴真模
Original assignee: Hyundai Motor Co
Current assignee: Hyundai Motor Co
Priority date: 2003-09-16
Filing date: 2003-12-30
Publication date: 2005-03-23
Anticipated expiration: 2023-12-30
Also published as: DE10358005B3; KR100520529B1; KR20050027717A; US6942591B2; JP2005090735A; CN1332143C; US20050059522A1

Abstract

Each control portion for controlling each friction element includes a switch valve and pressure control valve such that hydraulic pressure supplied to the friction element is fully controlled, and a control portion for controlling a friction element that is operated both at low and high speeds includes a switch valve that senses an operation of a friction member cooperatively with the friction element at the high speed such that the friction member receives different hydraulic pressure at low and high speeds. A plurality of fail-safe valves is included for enhancement of a fail-safe function of an automatic transmission.

Description

The hydraulic control system of six gear transmissions

Technical field

Generally speaking, the present invention relates to a kind of hydraulic control system of automatic transmission.The invention particularly relates to that a kind of gear shift vibration reduces and the hydraulic control system of the automatic transmission that the fuel mileage number improves.

Background technique

Usually automatic transmission comprises a torque-converters and the dynamical system that is connected the fast gear mechanism more than on this torque-converters.In addition, the hydraulic control system that is used for automatic transmission is selectively operated at least one operating element in the dynamical system according to the running state of automobile.

The variation of the type of this dynamical system and hydraulic control system is developed according to their scheme by the manufacturer of automobile.At present, four gear transmissions are very common on market, and still, the automatic transmission of five speed has realized the raising of the fuel mileage number of the raising of performance of actuating unit and automobile equally.

Recently, set about from a kind of like this five gear transmissions, six gear transmissions under study for action so that the fuel mileage number of the performance of the actuating unit of automatic transmission and the automobile that brings thus is further improved.

The information that background technique of the present invention partly discloses is only used for strengthening should not being considered to admit to the understanding of background technique of the present invention or this information of hint has in any form formed to this domestic those of ordinary skill in the art's known prior art.

Summary of the invention

Motivation of the present invention is for a kind of hydraulic control system that is used for six gear transmissions of automobile is provided, and this automobile has control accuracy and improves, and the gear shift vibration reduces the nonrestrictive advantage that improves with the fuel mileage number.

The exemplary hydraulic control system that is used for six gear transmissions of automobile according to one embodiment of present invention comprises:

Stably keep from the hydraulic pressure of oil pump conveying and the line pressure controlling component that line pressure is changed according to drive condition;

The rising of control torque-converters moment and control damping clutch start controlling component;

The line pressure that reduces line pressure and will reduce reduces controlling component as the pressure of pilot pressure output;

The on-off valve control member made, these parts comprise the hand control valve that changes hydraulic tubing according to manual operations, first switch valve by the line pressure and the first on/off electromagnetic valve, by the second switch valve of the line pressure and the second on/off electromagnetic valve with by line pressure with from third and fourth switch valve of the pilot pressure control of second switch valve;

First clutch controlling component, these parts comprise that the first clutch controlling component has just been controlled the operation pressure of first clutch like this by the first clutch side switch valve of the second task control electromagnetic valve and first clutch side pressure control valve;

The B1/C3 controlling component, these parts comprise by the three-clutch side switch valve of the second task control electromagnetic valve and three-clutch side pressure control valve, one is used for the control valve that the hydraulic tubing of the hydraulic pressure carried from three-clutch side pressure control valve is changed and will be transported to first break from the hydraulic pressure that this control valve receives and carry out the first break side error protection valve of failure protection function;

The second clutch controlling component, these parts comprise by the second clutch side switch valve of the 3rd task control electromagnetic valve and second clutch side pressure control valve and will be transported to second break from the hydraulic pressure that the second break side pressure control valve receives and the second break side error protection valve of execution failure protection function; With

The B2 controlling component; these parts comprise by the second break side switch valve of the 4th task control electromagnetic valve and the second break side pressure control valve; under the control of the operation pressure of three-clutch; the hydraulic pressure that will receive from the 4th task control solenoid valve be transported to six fast related switch valves of the second break side pressure control valve as pilot pressure and the hydraulic pressure that second clutch side pressure control valve receives will be transported to second clutch and carry out the second break side error protection valve of failure protection function.

In a further embodiment, hand control valve comprises:

One is connected to the hydraulic system operation pressure pipeline on the modulating valve;

In reverse gear, carry the reverse gear pressure line of reverse gear pressure; With

In forward gears, carry the forward gears pressure line of forward gears pressure.

In another embodiment, first switch valve comprises a valve body and a spool,

Wherein the valve body of first switch valve comprises:

Reception is from first port of the pilot pressure of the first on/off solenoid valve;

Relative with first port, receive second port as the line pressure of pilot pressure;

The 3rd port of receiving tube linear pressure;

Arrange at interval with a predetermined space, and will optionally be transported to the 4th and five-port of two ports of second switch valve from the hydraulic pressure that first port receives; With

The spool of first switch valve comprises:

Receive first step by the pilot pressure of first port;

Selectively with the second step of five-port with the floss hole connection;

The 3rd step that cooperates with second step is used for cooperating optionally the 3rd port is communicated with five-port with second step; With

The 4th step is used to receive the pilot pressure by second port, cooperates with the 3rd step selectively the 3rd port to be communicated with the 4th port, and selectively the 4th port is communicated with floss hole.

In another embodiment again, the second switch valve comprises a valve body and a spool,

Wherein the valve body of second switch valve comprises:

Reception is from first port of the pilot pressure of the second on/off solenoid valve;

Reception is from the 3rd port of the hydraulic pressure of first switch valve the 4th port;

Reception is from the 4th port of the hydraulic pressure of the first switch valve five-port;

The hydraulic pressure of the 3rd port is transported to the five-port of control valve as pilot pressure;

The hydraulic pressure of the 3rd port is transported to the 6th port of the 3rd switch valve as pilot pressure; With

The hydraulic pressure of the 4th port is transported to the 7th port of the 4th switch valve as pilot pressure,

The spool of second switch valve comprises:

Receive first step by the pilot pressure of first port;

The second step that five-port is communicated with floss hole selectively;

Selectively with the 3rd port and the 5th and the 6th port and the 3rd step that is communicated with; With,

Cooperate the 4th step that selectively the 6th port is communicated with floss hole with the 3rd step; With,

Cooperate the 5th step that selectively the 4th port is communicated with the 7th port with the 4th step.

In another embodiment, the 3rd switch valve comprises a valve body and spool,

Wherein, the valve body of the 3rd switch valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Relative with first port, receive second port from the pilot pressure of second switch valve;

Adjacent with second port, reception is as the 3rd port of the operation pressure of the first clutch of pilot pressure;

Adjacent with the 3rd port, reception is as the 4th port of the operation pressure of the three-clutch of pilot pressure;

Reception is as the five-port of the line pressure of source pressure;

The 6th port that the hydraulic pressure of five-port is carried to second clutch side pressure control valve selectively; With,

Discharging the hydraulic pressure by the 6th port output the 7th port and

Wherein the spool of the 3rd switch valve comprises:

Receive first step by the pilot pressure of first port;

The second step that the 6th port is communicated with the 7th port selectively;

The 3rd step that five-port is communicated with the 6th port selectively;

Receive the 4th step by the pilot pressure of the 4th port;

Receive the 5th step by the pilot pressure of the 3rd port,

Wherein an elastic element is arranged at a side of the 5th step.

In another embodiment, the 4th switch valve comprises a valve body and spool,

Wherein the valve body of the 4th switch valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Reception is as the five-port of the line pressure of source pressure;

Selectively the hydraulic pressure of five-port is transported to the 6th port of the pressure controlled valve of the second break side; With

The 7th port of the hydraulic pressure of the 6th port output has been passed through in discharging,

The spool of the 4th switch valve comprises:

Receive first step by the pilot pressure of first port;

The 3rd step that five-port is communicated with the 6th port selectively;

Receive the 4th step by the pilot pressure of the 4th port; With

Receive the 5th step by the pilot pressure of the 3rd port,

Wherein an elastic element is positioned at a side of the 5th step.

In another embodiment, first clutch side switch valve comprises a valve body and spool,

Wherein the valve body of first clutch side switch valve comprises:

Reception is from first port of the pilot pressure of first task control electromagnetic valve;

Relative with first port, reception is as second port of the pressure that is reduced of the reduction valve of pilot pressure;

Reception is as the 3rd port of the line pressure of source pressure;

Be transported to the 4th port of first clutch side pressure control valve with hydraulic pressure with the 3rd port, and

The spool of first clutch side switch valve comprises:

Receive first step by the pilot pressure of first port; With

Receive the pilot pressure by second port and cooperate selectively the second step that the 3rd port and the 4th port are communicated with first step,

Wherein an elastic element is positioned at a side of first step.

In another embodiment, first clutch side pressure control valve comprises a valve body, a spool and a cup that is used for keeping safely the spool mobile position that is positioned at valve body,

Wherein the valve body of first clutch side pressure control valve comprises:

Reception is from first port of the pilot pressure of first clutch side switch valve;

Reception is from second port of the pilot pressure of first task control electromagnetic valve;

Reception is as the 3rd port of the pressure that is reduced of the reduction valve of pilot pressure;

Reception is from the 4th port of the forward gears pressure of hand control valve;

The hydraulic pressure of the 4th port is transported to the five-port of first clutch; With

The 6th port of the hydraulic pressure of five-port output has been passed through in discharging, and

The spool of first clutch side pressure control valve comprises:

Reception is by the pilot pressure of second port input and the first step of selectively the 6th port being opened; With

Receive by the pilot pressure of the 3rd port and the second step that selectively the 4th port is communicated with five-port with the first step cooperation,

Wherein spool is positioned at valve body, between insert elastic element and cup, be used to receive pilot pressure from the input of first port.

So in another embodiment, three-clutch side switch valve comprises a valve body and a spool,

Wherein the valve body of three-clutch side switch valve comprises:

Reception is from first port of the pilot pressure of the second task control solenoid valve;

Relative with first port, receive second port that is reduced pressure as the reduction valve of pilot pressure;

Reception is as the 3rd port of the line pressure of source pressure; With

With the hydraulic pressure of the 3rd port be transported to three-clutch side pressure control valve the 4th port and

The spool of three-clutch side switch valve comprises:

Receive first step by the pilot pressure of first port; With

Receive by the pilot pressure of second port and with first step and cooperate the second step that selectively the 3rd port is communicated with the 4th port;

Wherein an elastic element is positioned at a side of first step.In another embodiment, three-clutch side pressure control valve comprises a valve body, a spool and a float element that is used for keeping safely the spool mobile position that is positioned at valve body,

Wherein the valve body of three-clutch side pressure control valve comprises:

Reception is from first port of the pilot pressure of three-clutch side switch valve;

Reception is from second port of the pilot pressure of the second task control solenoid valve;

Reception is as the 3rd port that is reduced pressure of the reduction valve of pilot pressure;

The hydraulic pressure of the 4th port is transported to the five-port of control valve; With

Discharging the hydraulic pressure by five-port output the 6th port and

The spool of three-clutch side pressure control valve comprises:

Reception is by the pilot pressure of second port input and the first step of selectively the 6th port being opened;

Receive by the pilot pressure of the 3rd port and the second step that selectively the 4th port is communicated with five-port with the first step cooperation; With

Receive the 3rd step by the pilot pressure of the 3rd port input,

Wherein spool is positioned at valve body, between insert elastic element and float element, be used to receive the pilot pressure of supplying with by first port.

In another embodiment, control valve comprises a valve body and a spool,

Wherein the valve body of control valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Reception is as the 3rd port of the operation pressure of the first clutch of pilot pressure;

Receive the 4th port of the operation pressure of three-clutch side pressure control valve;

Selectively will be transported to the five-port of three-clutch by the hydraulic pressure of the 4th port input;

Between first port and the 4th port, be used for selectively discharging the 6th port of the hydraulic pressure that passes through five-port output;

Between the 3rd port and five-port, and the 7th port that links to each other with the first break side switch valve; With

Discharging is from the 8th port of the hydraulic pressure of the 7th port discharging, and

The spool of control valve comprises:

Reception is by the pilot pressure of first port and the first step selectively the 6th port opened;

The second step that the 4th port and five-port are communicated with selectively;

The 3rd step that the 7th port is connected with the 8th port selectively;

Receive the 4th step by the pilot pressure of the 3rd port; With

Receive the 5th step by the pilot pressure of second port.

In another embodiment, the first break side error protection valve comprises a valve body and a spool,

Wherein the valve body of the first break side error protection valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Second port that is connected with the 7th port of control valve;

To be transported to the 3rd port of first break from the hydraulic pressure of second port input;

Discharging is from the 4th port of the hydraulic pressure of the 3rd port discharging;

Reception is as the five-port of the operation pressure of second break of pilot pressure;

Reception is as the 6th port of the operation pressure of the second clutch of pilot pressure;

Reception is as the 7th port of the operation pressure of the first clutch of pilot pressure; With

Reception as the 8th port of the reverse gear pressure of pilot pressure and

The spool of the first break side error protection valve comprises:

Receive first step by the pilot pressure of first port;

The second step adjacent with first step;

The 3rd step that the 3rd port is communicated with the second and the 4th port selectively;

Receive pilot pressure, and cooperate, selectively the 4th step that the 3rd port is communicated with the 4th port with the 3rd step by five-port;

Receive the 5th step by the pilot pressure of the 6th port;

Receive the 6th step by the pilot pressure of the 7th port; With

Receive the 7th step by the pilot pressure of the 8th port.

In another embodiment, second clutch side switch valve comprises a valve body and a spool,

Wherein the valve body of second clutch side switch valve comprises:

Reception is from first port of the pilot pressure of the 3rd task control solenoid valve;

Reception as the 3rd port of the line pressure of source pressure and

With the hydraulic pressure of the 3rd port be transported to second clutch side pressure control valve the 4th port and

The spool of second clutch side switch valve comprises:

Receive first step by the pilot pressure of first port; With

Wherein an elastic element is positioned at a side of first step.

In another embodiment, second clutch side pressure control valve comprises a valve body and a spool and a float element that is used for keeping safely the spool mobile position that is positioned at valve body,

Wherein the valve body of second clutch side pressure control valve comprises:

Reception is from first port of the pilot pressure of second clutch side switch valve;

Reception is from second port of the pilot pressure of the 3rd task control solenoid valve;

Reception is from the 4th port of the hydraulic pressure of the 3rd switch valve;

The hydraulic pressure of the 4th port is transported to the five-port of second clutch error protection valve; With

The spool of second clutch side pressure control valve comprises:

Reception is from the pilot pressure of second port input and the first step of selectively the 6th port being opened;

Receive the pilot pressure by the 3rd port and cooperate selectively the second step that the 4th port and five-port are communicated with first step; With

Receive the 5th step by the pilot pressure of the 3rd port input;

Wherein spool is positioned at valve body, between insert elastic element and float element, be used to receive pilot pressure from the input of first port.

In another embodiment, second clutch side error protection valve comprises a valve body and spool,

Wherein the valve body of second clutch side error protection valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Second port that communicates with the five-port of second clutch side pressure control valve; ,

To be transported to the 3rd port of second clutch from the hydraulic pressure of second port input;

The 4th port of the hydraulic pressure that discharging is discharged from the 3rd port;

Reception is as the five-port of the operation pressure of the three-clutch of pilot pressure;

Reception as the 6th port of the operation pressure of the first clutch of pilot pressure and

The spool of second clutch side error protection valve comprises:

Receive first step by the pilot pressure of first port;

The second step adjacent with first step;

Receive pilot pressure, and cooperate the 4th step that selectively the 3rd port is communicated with the 4th port with the 3rd step by five-port;

Receive the 5th step by the pilot pressure of the 6th port; With

The 5th step receives the 6th step by the pilot pressure of the 6th port together.

In another embodiment, the second break side switch valve comprises a valve body and a spool,

The valve body of second clutch side switch valve comprises:

Reception is from first port of the pilot pressure of the 4th task control solenoid valve;

Reception is as the 3rd port of the line pressure of source pressure; With

With the hydraulic pressure of the 3rd port be transported to the second break side pressure control valve the 4th port and

The spool of the second break side switch valve comprises:

Receive first step by the pilot pressure of first port; With

Wherein an elastic element is positioned at a side of first step.

In another embodiment, the second break side control valve comprises a valve body, a spool and a float element that is used for keeping safely the spool mobile position that is positioned at valve body,

Wherein the valve body of the second break side pressure control valve comprises:

Reception is from first port of the pilot pressure of the second break side switch valve;

Reception is from second port of the pilot pressure of the 4th task control solenoid valve;

Reception is from the 4th port of the hydraulic pressure of the 4th switch valve;

The hydraulic pressure of the 4th port is transported to the five-port of the second break side error protection valve:

The 6th port of the hydraulic pressure that discharging has been output by five-port; With

Reception is from the 7th port of the pilot pressure of six fast related switch valves,

The spool of the second break side pressure control valve comprises:

Receive by the pilot pressure of the 3rd port and with first step and cooperate the second step that selectively the 4th port is communicated with five-port;

Reception is from the 3rd step of the pilot pressure of the 3rd port input; With

Reception is from the 4th step of the pilot pressure of six fast related switch valves,

Wherein spool is positioned at valve body, between insert elastic element and float element, be used to receive pilot pressure by the input of first port.

In another embodiment, six fast related switch valves comprise a valve body and a spool,

Wherein, the valve body of six fast related switch valves comprises:

Reception is as first port of the operation pressure of the three-clutch of pilot pressure;

Reception is by second port of the pilot pressure of the 4th task control electromagnetic valve; With

Will from the hydraulic pressure of second port input as its pilot pressure be transported to the second break side pressure control valve the 3rd port and

The spool of six fast related switch valves comprises:

Receive first step by the pilot pressure of first port; With

The second step that second port is communicated with the 3rd port selectively,

Wherein an elastic element is positioned at a side of second step.

In another embodiment, the second break side error protection valve comprises a valve body and a spool,

Wherein the valve body of the second break side error protection valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Second port that is communicated with the five-port of the second break side pressure control valve;

To be transported to the 3rd port of second break from the hydraulic pressure of second port input;

The 4th port of the hydraulic pressure that discharging is discharged from from the 3rd port;

Reception is as the 6th port of the operation pressure of the three-clutch of pilot pressure;

Reception is as the 8th port of the operation pressure of first break of pilot pressure, and

Wherein the spool of the second break side error protection valve comprises:

Receive first step by the pilot pressure of first port;

The second step adjacent with first step;

Reception is by the pilot pressure of five-port and the 4th step that matches and selectively the 3rd port is communicated with the 4th port with the 3rd step;

Receive the 5th step by the pilot pressure of the 6th port;

Receive the 6th step by the pilot pressure of the 7th port; With

Receive the 7th step by the pilot pressure of the 8th port.

Description of drawings

Be included in the part that accompanying drawing in the specification has constituted this specification, and it shows several embodiments of the present invention in conjunction with the narration part, is used to explain principle of the present invention:

Fig. 1 is the schematic representation by one of hydraulic control system operation exemplary dynamical system according to the embodiment of the invention;

Fig. 2 is the work sheet of Fig. 1 dynamical system;

Fig. 3 is the schematic representation of hydraulic control system according to an embodiment of the invention;

Fig. 4 is the enlarged view of the on-off valve control member made in the hydraulic control system according to an embodiment of the invention;

Fig. 5 is the enlarged view of the first clutch for clutch control parts in the hydraulic control system according to an embodiment of the invention;

Fig. 6 is the enlarged view of the B1/C3 controlling component in the hydraulic control system according to an embodiment of the invention;

Fig. 7 is the enlarged view of the second clutch for clutch control part in the hydraulic control system according to an embodiment of the invention; And

Fig. 8 is the enlarged view of the B2 controlling component in the hydraulic control system according to an embodiment of the invention.

Embodiment

Hereinafter with embodiments of the present invention is described in detail in conjunction with the accompanying drawings.

Fig. 1 is according to one embodiment of present invention by the schematic representation of an exemplary dynamical system of hydraulic control system operation.

This exemplary dynamical system comprises the second planetary gear set PG2 of the planetary pinion set type of the first planetary gear set PG1 of a single small planetary gear set type and Lavingneaux shape.The second planetary gear set PG2 is positioned at and starts pusher side, and the first planetary gear set PG2 is positioned at its rear portion.

Gear ring among the first planetary gear set PG1, inventiona pinion carrier and sun gear are respectively hereinafter represented first gear ring, 2, the first inventiona pinion carrier 4 and first central gear 6.

With regard to the second planetary gear set PG2, it with the central gear of a long pinion, central gear with a short and small gear engagement, support the inventiona pinion carrier of long and short gear, gear ring is respectively the second hereinafter represented central gear 8, the 3rd central gear 10, third pinion frame 12, the three gear rings 14.

In structure shown in Figure 1, first gear ring 2 is fixedly attached on the input shaft 16, and this input shaft 16 links to each other with the outlet side of a motor, between insert the torque-converters (not shown), such first gear ring 2 is always as an input element.

First inventiona pinion carrier 4 links to each other with the 3rd central gear 10 erratically by first clutch C1, and simultaneously, also links to each other with second central gear 8 erratically by second clutch C2.First central gear 6 is fixedly attached on the case of transmission 18, so it is always as a fixed element.

Third pinion frame 12 links to each other with input shaft 16 erratically by three-clutch C3, and simultaneously, it also links to each other with case of transmission 18 erratically, between insertion with the first break B1 and the overrunning clutch OWC of parallel way layout.The 3rd gear ring 14 links to each other with output gear 20 on being connected to differential mechanism.

Second clutch C2 is linked to each other with case of transmission 18 with the connecting element that second central gear 8 connects together, between insert the second break B2, such second central gear 8 is selectively as a fixed element.

Above-mentioned dynamical system has been realized six forward gearss and a reverse gear by following operation, as shown in Figure 3, first clutch C1 is used for first forward gears, the first clutch C1 and the second break B2 are used for second forward gears, the first and second clutch C1 and C2 are used for the 3rd forward gears, first and three-clutch C1 and C3 be used for the 4th forward gears, second and three-clutch C2 and C3 be used for the 5th forward gears, the three-clutch C3 and the second break B2 are used for the 6th forward gears, and second clutch C2 and the first break B1 are used for reverse gear.Needing under the situation of engine brake, for example in the L scope, the first break B1 is operated.

According to work sheet shown in Figure 2, the gear-change operation of the dynamical system among Fig. 1 is tangible to those skilled in the art.

To describe an exemplary hydraulic control system of the above-mentioned this dynamical system of operation hereinafter in detail.

As shown in Figure 3, hydraulic control system comprises line pressure controlling component A according to an embodiment of the invention, mobilize controlling component B (1aunch control portion), decompression controlling component C, on-off valve control member made D, the first clutch controlling component E of control first clutch C1, control the B1/C3 controlling component F of the first break B1 and three-clutch C3, the second clutch controlling component G of control second clutch C2, with the B2 controlling component H of the control second break B2, conveying/be discharged into each friction member C1, C2 have so just been controlled, C3, the hydraulic pressure of B1 and B2.

Line pressure controlling component A mobilizes controlling component B and the realization of the controlling component C that reduces pressure and well known in the prior art similar.

Line pressure controlling component A comprises the solenoid valve S1 (linearity control) of a modulating valve 32 and a regulating and controlling valve 32.Therefore, line pressure controlling component A will be maintained a predetermined level by the hydraulic pressure that oil pump 30 provides and according to drive condition line pressure be changed, thus the fuel mileage number that obtains expecting.

Start controlling component B to comprise to be used to reduce the torque-converters control valve 34 of line pressure, the damping clutch control valve 36 of control engagement of damping clutch and disconnection and according to solenoid valve S2 (task control) from the electrical signal control damping clutch control valve 36 of transmission control unit (TCU).According to this layout, the torque that can obtain the torque-converters that is used to quicken increases, and can control damping clutch it is operated under the high speed of a motor vehicle.

Decompression controlling component C comprises a reduction valve 38.This reduction valve 38 hydraulic pressure that provided by oil pump 30 is provided and this hydraulic pressure that is reduced is flowed to solenoid valve S1 and S2 as the pilot pressure of solenoid valve S1 and S2.Simultaneously, with in the controlling component of describing, this controlling component was used to control the clutch and the break of dynamical system after reduction valve 38 was transported to this pressure that is reduced.

On-off valve control member made D comprises a hand control valve 40 that changes hydraulic tubing according to manual operations, first switch valve 42 by line pressure and first on/off solenoid valve SS1 control, by the second switch valve 44 of line pressure and second on/off solenoid valve SS2 control with by third and

fourth switch valve

46 and 48 of line pressure with the pilot pressure control that comes from second solenoid valve 44.

The first clutch for clutch control parts E comprises the first clutch side switch valve 50 and the first clutch side pressure control valve 52 by first task control electromagnetic valve DS1 control, and first clutch controlling component E also controls the operation pressure of first clutch C1.

B1/C3 controlling component F comprises three-clutch side switch valve 54 and the three-clutch side pressure control valve 56 by second task control solenoid valve DS2 control; be used to change the hydraulic pressure of carrying by three-clutch side pressure control valve 56 hydraulic pipe line control valve 58 and will be transported to the first break B1 from the hydraulic pressure that control valve 58 receives and carry out the first break side error protection valve 60 of failure protection function.

The operation pressure of second clutch controlling component G control second clutch C2.The second clutch for clutch control parts G comprises by the second clutch side switch valve 62 and the second clutch side pressure control valve 64 of the 3rd task control solenoid valve DS3 control and will be transported to second clutch C2 from the hydraulic pressure that second clutch side pressure control valve 64 receives and the second clutch side error protection valve 66 of execution failure protection function.

B2 controlling component H controls the operation pressure of the second break B2.B2 controlling component H comprises the second break side switch valve 68 and the second break side pressure control valve 70 by the 4th task control solenoid valve DS4 control; under the control of the operation pressure of three-clutch C3; to be transported to six fast related switch valves 72 of the second break side pressure control valve 70 as pilot pressure from the hydraulic pressure that the 4th task control solenoid valve DS4 receives and will be transported to the second break B2 from the hydraulic pressure that the second break side pressure control valve 70 receives and the second break side error protection valve 74 of execution failure protection function.

Below will be described in more detail this hydraulic control system.

As shown in Figure 4, hand control valve 40 selectively will be from hydraulic system operation pressure pipeline (line pressure line) 80 hydraulic pressures that receive that link to each other with reduction valve 38, according to the shift range of automobile, be transported to reverse gear pressure line 82 and forward gears pressure line 84.

Reverse gear pressure line 82 links to each other with the first break B1 and links to each other with modulating valve 32, so that the hydraulic pressure in the pipeline 82 can be controlled in the R scope.In addition, reverse gear pressure line 82 links to each other with the second break side error protection valve 74 with the first break side error protection valve 60, is transported to (with reference to figure 3) in them so that hydraulic pressure is used as pilot pressure.The conveying operations pressure thereby forward gears pressure line 84 links to each other with the controlling component of control friction member.

First switch valve 42 comprises a valve body and a spool that is positioned at valve body.

The valve body of first switch valve 42 comprises first port 90 of reception from the pilot pressure of the first on/off solenoid valve SS1, with first port, 90 relative second ports 92 that also receive as the line pressure of pilot pressure, the 3rd port 94 of receiving tube linear pressure and selectively be transported to the port one 14 of

second switch valve

44 and 116 the 4th and five-

port

96 and 98 with the hydraulic pressure that an arranged at predetermined intervals is used for receiving from the 3rd port 94.

The spool of first switch valve 42 comprises the first step 100 that receives by the pilot pressure of first port 90, selectively with the second step 102 of five-port 98 with floss hole EX connection, cooperate the 3rd step 104 that selectively the 3rd port 94 is communicated with five-port 98 with second step 102, with the pilot pressure that receives by second port 92, and cooperate with the 3rd step 104 and selectively the 3rd port 94 to be communicated with the 4th port 96, and the 4th step 106 that selectively the 4th port 96 is communicated with floss hole EX.

The radius of radius ratio the 4th step 106 of first step 100 is little.

When the first on/off solenoid valve SS1 disconnected, to the skew of the left side of Fig. 4, therefore the 3rd port 94 was communicated with the 4th port 96 spool under the effect of the pilot pressure of importing from second port 92.In contrast, when the first on/off solenoid valve SS1 was switched on, spool was to the skew of the right of Fig. 4, and therefore the 3rd port 94 is communicated with five-port 98.

Second switch valve 44 comprises a valve body and a spool that is positioned at valve body.

The valve body of second switch valve 44 comprises first port one 10 of reception from the pilot pressure of the second on/off solenoid valve SS2, with first port one, 10 relative second port ones 12 that also receive as the line pressure of pilot pressure, reception is from the 3rd port one 14 of the hydraulic pressure of the 4th port 96 of first switch valve 42, reception is from the 4th port one 16 of the hydraulic pressure of the five-port 98 of first switch valve 42, the hydraulic pressure of the 3rd port one 14 is transported to the five-port 118 of control valve 58 as pilot pressure, the hydraulic pressure of the 3rd port one 14 is transported to the 6th port one 20 of the 3rd switch valve 46 as pilot pressure and the hydraulic pressure of the 4th port one 16 is transported to the 7th port one 22 of the 4th switch valve 48 as pilot pressure.

The spool of second switch valve 44 comprises the first step 124 that receives by the pilot pressure of first port one 10, the second step 126 that five-port 118 is communicated with floss hole EX selectively, the 3rd step 128 that the 3rd port one 14 is communicated with the 5th and the 6th port one 18 and 120 selectively, cooperate the 4th step 130 that selectively the 6th port one 20 is communicated with floss hole EX and the 5th step 132 that selectively the 4th port one 16 is communicated with the 7th port one 22 with 130 cooperations of the 4th step with the 3rd step 128.

The 5th step 132 receives the pilot pressure of second port one 12, and its radius is less than the radius of first step 124.

When the second on/off solenoid valve SS2 disconnected, spool was offset to the right of Fig. 4 under the effect of the pilot pressure of being imported by second port one 12.Therefore, the 3rd port one 14 communicates with the 6th port one 20 and the 5th and the 7th port one 18 and 122 communicates with floss hole EX respectively.On the contrary, when the second on/off solenoid valve SS2 was switched on, spool was to the skew of the left side of Fig. 4, and therefore the 3rd port one 14 communicates with five-port 118, and the 4th port one 16 communicates with the 7th port one 22.

The 3rd switch valve 46 comprises a valve body and a spool that is positioned at valve body.

The valve body of the 3rd switch valve 46 comprises first port one 40 of reception as the line pressure of pilot pressure, with first port one, 40 relative second port ones 42 that also receive from the pilot pressure of second switch valve 44, adjacent with second port one 42 and receive the 3rd port one 44 as the operation pressure of the first clutch C1 of pilot pressure, adjacent with the 3rd port one 44 and receive the 4th port one 46 as the operation pressure of the three-clutch C3 of pilot pressure, reception is as the five-port 148 of the line pressure of source pressure, the 6th port one 50 that the hydraulic pressure of five-port 148 is carried to second clutch side pressure control valve 64 and discharging the 7th port one 52 of the hydraulic pressure by 50 outputs of the 6th port one selectively.

The spool of the 3rd switch valve 46 comprises the first step 154 that receives by the pilot pressure of first port one 40, the second step 156 that the 6th port one 50 is communicated with the 7th port one 52 selectively, the 3rd step 158 that five-port 148 is communicated with the 6th port one 50 selectively, receive the 4th step 160 of the pilot pressure that passes through the 4th port one 46 and the 5th step 162 that the pilot pressure of the 3rd port one 44 is passed through in reception.

One elastic element 164 is arranged at a side of the 5th step 162, and spool always is partial to the right of figure like this.

According to passing through the first, the second, the 3rd, the 4th port one 40,142,144, with the variation of 146 pilot pressures that provide, spool left and move right, thereby the 3rd switch valve 46 selectively will be transported to the downstream side by the 6th port one 50 from the hydraulic pressure of five-port 148 inputs.

The 4th switch valve 48 comprises a valve body and is positioned at the spool of valve body.

The valve body of the 4th switch valve 48 comprises first port one 70 of reception as the line pressure of pilot pressure, with first port one, 70 relative second port ones 72 that also receive from the pilot pressure of second switch valve 44, adjacent with second port one 72 and receive the 3rd port one 74 as the operation pressure of the first clutch C1 of pilot pressure, adjacent with the 3rd port one 74 and receive the 4th port one 76 as the operation pressure of the three-clutch C3 of pilot pressure, reception is as the five-port 178 of the line pressure of source pressure, selectively the hydraulic pressure with five-port 178 is transported to the 6th port one 80 of the second break side pressure control valve 70 and the 7th port one 82 that the hydraulic pressure of the 6th port one 80 outputs has been passed through in discharging.

The spool of the 4th switch valve 48 comprises the first step 184 that receives by the pilot pressure of first port one 70, the second step 186 that the 6th port one 80 is communicated with the 7th port one 82 selectively, the 3rd step 188 that five-port 178 is communicated with the 6th port one 80 selectively, receive the 4th step 190 of the pilot pressure that passes through the 4th port one 76 and the 5th step 192 that the pilot pressure of the 3rd port one 74 is passed through in reception.

One elastic element 194 is positioned at a side of the 5th step 192, so spool always is partial to the right of figure.

According to passing through the first, the second, the 3rd, the 4th port one 70,172,174, with the variation of 176 pilot pressures of carrying, spool left and move right, therefore the 4th switch valve 48 selectively will be transported to the downstream side by the 6th port one 80 from the hydraulic pressure of five-port 178 inputs.

Fig. 5 is the enlarged view according to the first clutch controlling component E in the embodiments of the invention hydraulic control system.

First clutch side switch valve 50 comprises a valve body and a spool that is positioned at valve body.

The valve body of first clutch side switch valve 50 comprises first port 200 of reception from the pilot pressure of first task control electromagnetic valve DS1, relative with first port 200 and receive second port 202 as the pressure that is reduced of the reduction valve 38 of pilot pressure, reception is as the 3rd port 204 of the line pressure of source pressure and the hydraulic pressure of the 3rd port 204 is transported to the 4th port 206 of first clutch side pressure control valve 52.

The spool of first clutch side switch valve 50 comprises the first step 208 that receives the pilot pressure by first port 200 and receives the pilot pressure by second port 202 and cooperate selectively the second step 210 that the 3rd port 204 and the 4th port 206 are communicated with first step 208.

One elastic element 212 is positioned at a side of first step 208, so spool always is partial to the left side among the figure.

When first clutch side switch valve 50 was not in the task control, spool moved to the right side of figure under the effect of the pilot pressure of second port, 202 inputs, so it cuts off the 3rd port 204.

When the task control pressure of first task control electromagnetic valve DS1 is imported by first port 200, spool can be moved to the left according to the size of task, therefore it opens the 3rd port 204, so hydraulic pressure is imported first clutch side pressure control valves 52 as pilot pressure by the 4th port 206.

First clutch side pressure control valve 52 comprises a valve body, a spool and a cup 220 that is used for keeping safely the spool mobile position that is positioned at valve body.

The valve body of first clutch side pressure control valve 52 comprises first port 222 of reception from the pilot pressure of first clutch side switch valve 50, reception is from second port 224 of the pilot pressure of first task control electromagnetic valve DS1, reception is as the 3rd port 226 of the pressure that is reduced of the reduction valve 38 of pilot pressure, reception is from the 4th port 208 of the forward gears pressure of hand control valve 40, the hydraulic pressure of the 4th port 228 is transported to the five-port 230 of first clutch C1 and the 6th port 232 that the hydraulic pressure of five-port 230 outputs has been passed through in discharging.

The spool of first clutch side pressure control valve 52 comprises that reception is by the pilot pressure of second port 224 input and the first step of selectively the 6th port 232 being opened 236 with receive by the pilot pressure of the 3rd port 226 and with first step 236 and cooperate the second step 238 that selectively the 4th port 228 is communicated with five-port 230.

Spool is positioned at valve body, between insert elastic element 234 and cup 220, be used to receive pilot pressure from 222 inputs of first port.

When first task control electromagnetic valve DS1 is not in task control following time, the pilot pressure of the 3rd port 226 inputs moves right spool, therefore the 4th port 228 is cut off.

When the task control pressure of first task control electromagnetic valve DS1 is transfused to by second port 224, spool can be moved to the left according to the size of role pressure, therefore it opens the 4th port 228, and hydraulic pressure just is input among the first clutch C1 through five-port 230 as operation pressure like this.

Pilot pressure is input to first port 222 from first clutch side switch valve 50 subsequently then, and cup 220 acts on the spool fully like this, so maximum operating pressure is imported on the first clutch C1.

Promptly, in the present embodiment, control according to first task control electromagnetic valve DS1, because pilot pressure is transported to the hydraulic pressure that therefore leads in second port 224 and is imported into first clutch C1, because pilot pressure is transported to first port 222, therefore whole line pressures is transported near the first clutch C1 of gear shift end then.

Fig. 6 is the enlarged view of the B1/C3 controlling component in the hydraulic control system according to an embodiment of the invention.

Three-clutch side switch valve 54 comprises a valve body and is positioned at the spool of valve body.

The valve body of three-clutch side switch valve 54 comprises first port 240 of reception from the pilot pressure of the second task control solenoid valve DS2, with first port, 240 relative second ports 242 that are reduced pressure that also receive as the reduction valve 38 of pilot pressure, reception is as the 3rd port 224 of the line pressure of source pressure and the hydraulic pressure of the 3rd port 244 is transported to the 4th port 246 of three-clutch side pressure control valve 56.

The spool of three-clutch side switch valve 54 comprises that the first step 248 and the reception that receive the pilot pressure that passes through first port 240 cooperate the second step 250 that selectively the 3rd port 244 is communicated with the 4th port 246 by the pilot pressure of second port 242 and with first step 248.

One elastic element 252 is positioned at a side of first step 248, and spool always is partial to the left side among the figure like this.

When three-clutch side switch valve 54 was not in the task control, moved on spool the right in figure under the effect of the pilot pressure of importing by second port 242, and it cuts off the 3rd port 244 like this.

When the task control pressure of the second task control solenoid valve when first port 240 is transfused to, spool can be moved to the left according to the size of role pressure, therefore it opens the 3rd port 244, thereby hydraulic pressure can be carried to the pressure controlled valve 56 of three-clutch side by the 4th port 246 as pilot pressure.

Three-clutch side pressure control valve 56 comprises a valve body and a spool and the float element 260 that can keep the spool mobile position safely that is positioned at valve body.

The valve body of three-clutch side pressure control valve 56 comprises first port 262 of reception from the pilot pressure of three-clutch side switch valve 54, reception is from second port 264 of the pilot pressure of the second task control solenoid valve DS2, reception is as the 3rd port 266 that is reduced pressure of the reduction valve 38 of pilot pressure, reception is from the 4th port 268 of the pressure of the forward gears of hand control valve 40, the hydraulic pressure of the 4th port 268 is transported to the five-port 270 of control valve 58 and the 6th port 272 that the hydraulic pressure of five-port 270 outputs has been passed through in discharging.

The spool of three-clutch side pressure control valve 56 comprises that reception is by the pilot pressure of second port, 264 inputs and the first step of selectively the 6th port 272 being opened 276, receive the pilot pressure by the 3rd port 266 and cooperate the 3rd port 266 that selectively the 4th port 268 is communicated with five-port 270 and receive the 3rd step 280 that passes through the pilot pressure that the 3rd port 266 imports with first step 276.

Spool is positioned at valve body, between insert elastic element 274 and float element 260, be used to receive the pilot pressure of supplying with by first port 262.

When the second task control solenoid valve DS2 was not in the task control, spool moved right under the effect of the pilot pressure of being imported by the 3rd port 266, therefore the 4th port 268 was cut off.

When the task control pressure of the second task control solenoid valve DS2 is imported by second port 264, spool can be moved to the left according to the size of role pressure, therefore the 4th port 268 is opened, hydraulic pressure can be imported in the control valve 58 by the operation pressure of five-port 270 as control valve 58 like this.

Pilot pressure is transported in first port 262 from three-clutch side switch valve 54 thereupon then, thereby float element 260 acts on the spool fully, so maximum operating pressure is imported in the control valve 58.

Promptly, in this embodiment, control according to the second task control solenoid valve DS2, because pilot pressure is transported to second port 264, therefore the hydraulic pressure that leads is transported in the control valve 58, because pilot pressure is transported in first port 262, therefore all line pressure is transported near in the control valve 58 of gear shift end then.

Control valve 58 is carried the operation pressure that receives from three-clutch side pressure control valve 56, and it comprises a valve body and a spool that is positioned at valve body.

The valve body of control valve 58 comprises first port 290 of reception as the line pressure of pilot pressure, with first port, 290 relative second ports 292 that also receive from the pilot pressure of second switch valve 44, reception is as the 3rd port 294 of the operation pressure of the first clutch C1 of pilot pressure, receive the 4th port 296 of the operation pressure of three-clutch side pressure control valve 56, selectively will be transported to the five-port 298 of three-clutch C3 by the hydraulic pressure of the 4th port 296 inputs, between first port 290 and the 4th port 296, selectively discharge the 6th port 300 of the hydraulic pressure that has passed through five-port 298 outputs, between the 3rd port 294 and five-port 298 and the 7th port 302 that links to each other with the first break side switch valve 60 and discharging from the 8th port 304 of the hydraulic pressure of the 7th port 302 discharging.

The spool of control valve 58 comprises that reception is by the pilot pressure of first port 290 and the first step 306 selectively the 6th port 300 opened, the second step 308 that the 4th port 296 and five-port 298 is communicated with selectively, the 3rd step 310 that the 7th port 302 is connected with the 8th port 304 selectively, receive the 4th step 312 of the pilot pressure that passes through the 3rd port 294 and the 5th step 314 that the pilot pressure of second port 272 is passed through in reception.

When spool is shifted to the left side among the figure, be transported to three-clutch C3 through five-port 298 from the hydraulic pressure of the 4th port 296 inputs.On the contrary, when spool is shifted to the right among the figure, be transported to the first break side error protection valve 60 through the 7th port 302 from the hydraulic pressure of the 4th port 296 inputs.

The first break side error protection valve 60 comprises a valve body and a spool that is positioned at valve body.

The valve body of the first break side error protection valve 60 comprises first port 320 of reception as the hydraulic line pressure of pilot pressure; second port 322 that is connected with the 7th port 302 of control valve 58; to be transported to the 3rd port 324 of the first break B1 from the hydraulic pressure of second port, 322 inputs; discharging is from the 4th port 326 of the hydraulic pressure of the 3rd port 324 dischargings; reception is as the five-port 328 of the operation pressure of the second break B2 of pilot pressure; reception is as the 6th port 330 of the operation pressure of the second clutch C2 of pilot pressure; reception is as the 7th port 332 of the operation pressure of the first clutch C1 of pilot pressure and receive the 8th port 334 as the reverse gear pressure of pilot pressure.

The spool of the first break side error protection valve 60 comprises the first step 336 that receives by the pilot pressure of first port 320; the second step 338 adjacent with first step 336; selectively with the 3rd port 324 and the second and the 4th port 322; 326 the 3rd steps 340 that are communicated with; receive pilot pressure by five-port 328; and cooperate with the 3rd step 340; the 4th step 342 that the 3rd port 324 is communicated with the 4th port 326 selectively; receive the 5th step 344 by the pilot pressure of the 6th port 330; receive the 6th step 346 of the pilot pressure that passes through the 7th port 332 and the 7th step 348 that the pilot pressure of the 8th port 334 is passed through in reception.

Therefore; the first break side error protection valve 60 or will be transported to the first break B1 from the hydraulic pressure of three-clutch side pressure control valve 56; perhaps carry out failure protection function; wherein hydraulic pressure is transported to the second break B2 and first simultaneously in for example fault owing to automatic transmission; under the situation of second clutch C1 and C2, it is discharged into the first break B1 with hydraulic pressure.

Fig. 7 is the enlarged view of the second clutch controlling component G in the hydraulic control system according to an embodiment of the invention.

Second clutch side switch valve 62 comprises a valve body and a spool that is positioned at valve body.

The valve body of second clutch side switch valve 62 comprises first port 350 of reception from the pilot pressure of the 3rd task control solenoid valve DS3, with first port, 350 relative second ports 352 that are reduced pressure that also receive as the reduction valve 38 of pilot pressure, reception is as the 3rd port 354 of the line pressure of source pressure and the hydraulic pressure of the 3rd port 354 is transported to the 4th port 356 of second clutch side pressure control valve 64.

The spool of second clutch side switch valve 62 comprises first step 358 and pilot pressure that second port 352 is passed through in reception and the second step 360 that selectively the 3rd port 354 the 4th port 356 is communicated with first step 358 cooperations that receives by the pilot pressure of first port 350.

One elastic element 362 is positioned at a side of first step 358, and spool always is partial to the left side among the figure like this.

When second clutch side switch valve 62 was not in the task control, spool was shifted to the right the figure under the effect of the pilot pressure of importing from second port 352, thereby the 3rd port 354 is cut off.

When the task control pressure of the 3rd task control solenoid valve DS3 when first port 350 is transfused to, spool is moved to the left according to the size of role pressure, thereby the 3rd port 354 is opened, and hydraulic pressure can be used as pilot pressure and is input in the second clutch side pressure control valve 64 by the 4th port 356 like this.

Second clutch side pressure control valve 64 comprises a valve body and a spool and a float element 370 that is used for keeping safely the spool mobile position that is positioned at valve body.

The valve body of second clutch side pressure control valve 64 comprises first port 372 of reception from the pilot pressure of second clutch side switch valve 62; reception is from second port 374 of the pilot pressure of the 3rd task control solenoid valve DS3; reception is as the 3rd port 376 of the pressure that is reduced of the reduction valve 38 of pilot pressure; reception is from the 4th port 378 of the hydraulic pressure of the 3rd switch valve 46; the hydraulic pressure of the 4th port 378 is transported to the five-port 380 of second clutch side error protection valve 66 and the 6th port 382 that the hydraulic pressure of five-port 380 outputs has been passed through in discharging.

The spool of second clutch side pressure control valve 64 comprises that reception is from the pilot pressure of second port, 374 inputs and the first step of selectively the 6th port 382 being opened 386, receive the pilot pressure by the 3rd port 376 and cooperate selectively second step 388 that the 4th port 378 and five-port 380 are communicated with and the 3rd step 390 that receives the pilot pressure of importing by the 3rd port 376 with first step 386.

Spool is positioned at valve body, between insert elastic element 384 and float element 370, be used to receive pilot pressure from 372 inputs of first port.

When the 3rd task control solenoid valve DS3 was not in the task control, spool moved right under the effect of the pilot pressure of the 3rd port 376 inputs, thereby the 4th port 378 is cut off.

When the task control pressure of the 3rd task control solenoid valve DS3 during through 374 inputs of second port; spool can be moved to the left according to the size of role pressure; thereby the 4th port 378 is opened, and hydraulic pressure is input to second clutch side error protection valve 66 as operation pressure through five-port 380 like this.

Pilot pressure is transported to first port 372 from second clutch side switch valve 62 subsequently then, and float element 370 fully acts on the spool like this, so maximum operating pressure is transported to second clutch side error protection valve 66 places.

Promptly; in the present embodiment; control according to the 3rd task control solenoid valve DS3; because pilot pressure is transported in second port 374; guiding (pilot) hydraulic pressure is transported to second clutch side error protection valve 66 like this; because pilot pressure is transported in first port 372, therefore all line pressure is imported near the second clutch side error protection valve 66 of gear shift end then.

Second clutch side error protection valve 66 comprises a valve body and a spool that is positioned at valve body.

The valve body of second clutch side error protection valve 66 comprises first port 400 of reception as the line pressure of pilot pressure; second port 402 that communicates with the five-port 380 of second clutch side pressure control valve 64; to be transported to the 3rd port 404 of second clutch C2 from the hydraulic pressure of second port, 402 inputs; the 4th port 406 of the hydraulic pressure that discharging is discharged from the 3rd port 404; reception is as the five-port 408 of the operation pressure of the three-clutch C3 of pilot pressure, and reception is as the 6th port 410 of the operation pressure of the first clutch C1 of pilot pressure.

The spool of second clutch side error protection valve 66 comprises the first step 412 that receives by the pilot pressure of first port 400; the second step 414 adjacent with first step 412; the 3rd step 416 that the 3rd port 404 is communicated with the second and the 4th port 402 and 406 selectively; receive pilot pressure by five-port 408; and cooperate the 4th step 418 that selectively the 3rd port 404 is communicated with the 4th port 406 with the 3rd step 416; receive the 5th step 420 of the pilot pressure that passes through the 6th port 410 and the 6th step 422 that the 5th step 420 receives the pilot pressure that passes through the 6th port 410 together.

Therefore; second clutch side error protection valve 66 or will be transported to second clutch C2 by hydraulic pressure from second clutch side pressure control valve 64 input; perhaps carry out the function of error protection; wherein it for example prevented that fault by automatic transmission causes first; second; with three-clutch C1, operation in the time of C2 and C3.

Fig. 8 is the enlarged view of the B2 control unit H in the hydraulic control system according to an embodiment of the invention.

The second break side switch valve 68 comprises a valve body and a spool that is positioned at valve body.

The valve body of the second break side switch valve 68 comprises first port 450 of reception from the pilot pressure of the 4th task control solenoid valve DS4, relative with first port 450 and receive second port 452 as the pressure that is reduced of the reduction valve 38 of pilot pressure, reception is as the 3rd port 454 of the line pressure of source pressure and the hydraulic pressure of the 3rd port 454 is transported to the 4th port 456 of the second break side pressure control valve 70.

The spool of the second break side switch valve 62 comprises the first step 458 that receives the pilot pressure by first port 450 and receives the pilot pressure by second port 452 and cooperate selectively the second step 460 that the 3rd port 454 and the 4th port 456 are communicated with first step 458.

One elastic element 462 is positioned at a side of first step 458, and spool always is partial to the left side among the figure like this.

When the second break side switch valve 68 was not in the task control, spool moved to the right of figure under the effect of the pilot pressure of importing by second port 452, thereby the 3rd port 454 is cut off.

When the task control pressure of the 4th task control solenoid valve DS4 during through 450 inputs of first port, spool is moved to the left according to the size of role pressure, therefore the 3rd port 454 is opened, hydraulic pressure can be used as pilot pressure and is imported into the second break side pressure control valve 70 through the 4th port 456 like this.

The second break side pressure control valve 70 comprises a valve body, a spool and a float element 470 that keeps the spool mobile position safely that is positioned at valve body.

The valve body of the second break side pressure control valve 70 comprises first port 472 of reception from the pilot pressure of the second break side switch valve 68; reception is from second port 474 of the pilot pressure of the 4th task control solenoid valve DS4; reception is as the 3rd port 476 of the pressure that is reduced of the reduction valve 38 of pilot pressure; reception is from the 4th port 478 of the hydraulic pressure of the 4th switch valve 48; the hydraulic pressure of the 4th port 478 is transported to the five-port 480 of the second break side error protection valve 74; the 6th port 482 of the hydraulic pressure that discharging has been output by five-port 380 and receive the 7th port 484 from the pilot pressure of six fast related switch valves 72.

The spool of the second break side pressure control valve 70 comprises that reception is from the pilot pressure of second port, 474 inputs and the first step of selectively the 6th port 482 being opened 490, the pilot pressure and the first step 490 that receive by the 3rd port 476 cooperate the second step 492 that selectively the 4th port 478 is communicated with five-port 480, reception is from the 3rd step 494 of the pilot pressure of the 3rd port 476 input and receive the 4th step 496 from the pilot pressure of six fast related switch valves 72.

Spool is positioned at valve body, between insert elastic element 486 and float element 470, be used to receive pilot pressure by 472 inputs of first port.

Six fast related switch valves 72 comprise a valve body and a spool that is positioned at valve body.

The valve body of six fast related switch valves 72 comprises first port 500 of reception as the operation pressure of the three-clutch C3 of pilot pressure, reception is by second port 502 of the pilot pressure of the 4th task control solenoid valve DS4 control and will be transported to the 3rd port 504 of the second break side pressure control valve 70 from the hydraulic pressure of second port, 502 inputs as its pilot pressure.

The spool of six fast related switch valves 72 comprises first step 506 that receives the pilot pressure that passes through first port 500 and the second step 508 that selectively second port 502 is communicated with the 3rd port 504.

One elastic element 510 is positioned at a side of second step 508, and spool always is partial to the left side among the figure like this.

When the 4th task control solenoid valve DS4 was not in task control, the spool of the second break side pressure control valve 70 moved right under the effect of the pilot pressure of importing by the 3rd port 476, thereby the 4th port 478 is cut off.

When the task control pressure of the 4th task control solenoid valve DS4 is imported by second port 474; spool can be moved to the left according to the size of role pressure; thereby the 4th port 478 is opened, and hydraulic pressure is input in the second break side error protection valve 74 through five-port 480 as operation pressure like this.

Pilot pressure is imported into first port 472 from the second break side switch valve 68 subsequently then, and float element acts on the spool fully like this, thereby maximum operating pressure is imported in the second break side error protection valve 74.

Promptly; in this present embodiment; control according to the 4th task control solenoid valve DS4; because pilot pressure is input to second port 474; therefore the hydraulic pressure that leads is imported in the second break side error protection valve 66; because pilot pressure is transported to first port 472, therefore whole line pressures is imported near the second break side error protection valve 74 of gear shift end then.

As advancing 3-5 shelves D3-D5 (referring to Fig. 2), wherein three-clutch C3 is operated under the situation of top gear, and the operation pressure of three-clutch C3 is transported in the six fast related switch valves 72 as first port 500 of pilot pressure through it.

In this case, the spool of six fast related switch valves 72 moves to the right of figure, and therefore, second port 502 that is used to receive the pilot pressure of the 4th task control solenoid valve DS4 becomes with the 3rd port 504 and communicates.

Pilot pressure is transported in the 7th port 484 of the second break side pressure control valve 70 successively through the 3rd port 504.Therefore, under the effect of the pressure that is transported to the 7th port 484, the spool of the second break side pressure control valve 70 is partial to the right among the figure slightly.

Therefore, the second break side pressure control valve 70 has reduced the operation pressure of the second break B2 that is output through five-port 480.

Like this, the second break side pressure control valve 70 can be controlled the operation pressure of the second break B2 according to top gear and the required moment size of bottom gear.This means that precision has improved in hydraulic pressure control.

The second break side error protection valve 74 comprises a valve body and is positioned at the spool of this valve body.

The valve body of the second break side error protection valve 74 comprises first port 520 of reception as the line pressure of pilot pressure; second port 522 that is communicated with the five-port 480 of the second break side pressure control valve 70; to be transported to the 3rd port 524 of the second break B2 from the hydraulic pressure of second port, 522 inputs; the 4th port 526 of the hydraulic pressure that discharging is discharged from from the 3rd port 524; reception is as the five-port 528 of the operation pressure of the second break B2 of pilot pressure; reception is as the 6th port 530 of the operation pressure of the three-clutch C3 of pilot pressure; reception is as the 7th port 532 of the operation pressure of the first clutch C1 of pilot pressure and receive the 8th port 534 as the operation pressure of the first break B1 of pilot pressure.

The spool of the second break side error protection valve 74 comprises the first step 536 that receives by the pilot pressure of first port 420; the second step 538 adjacent with first step 536; the 3rd step 540 that the 3rd port 524 is communicated with the second and the

4th port

522 and 526 selectively; reception is by the pilot pressure of five-port 528 and the 4th step 542 that matches and selectively the 3rd port 524 is communicated with the 4th port 526 with the 3rd step 540; receive the 5th step 524 by the pilot pressure of the 6th port 530; receive the 6th step 546 of the pilot pressure that passes through the 7th port 532 and the 7th step 548 that the pilot pressure of the 8th port 534 is passed through in reception.

Therefore; the second break side error protection valve 74 or will be transported to the second break B2 from the hydraulic pressure of the second break side pressure control valve 70 input; perhaps carry out failure protection function, wherein it has prevented the second break B2 that caused by TRANS FAILSAFE PROG and first and operation three-clutch C1 and C3 the time.

According to the hydraulic control system of the embodiment of the invention, accumulator (accumulator) AC1 is positioned on the forward gears pressure line, and like this, forward gears pressure will be stablized.

In addition, accumulator AC2 is added to from third and

fourth switch valve

46 and 48 in the pipeline of

error protection valve

60,66,74, and the pressure in the pipeline will be stabilized like this.

Accumulator AC2 also can make from first clutch side pressure control valve 52, the three-clutch side pressure control valves 56, and the hydraulic pressure of discharging is stablized in the second clutch side pressure control valve 64 and the second break side pressure control valve 70.

In the ingress (referring to Fig. 2) of the first break B1 that operates with low switching speed and reverse gear,, reciprocable valve SB can receive directly from the reverse gear pressure of hand control valve 40 inputs and the hydraulic pressure of importing from the first break side error protection valve 60 with geared-down speed to such an extent as to being so arranged the first break B1.

Accumulator is added in and enters the first, the second and three-clutch C1, in every pipeline of C2 and C3 and the second break B2.

According to this hydraulic control system of the embodiment of the invention, the first and second on/off solenoid valve SS1 and SS2 are operated as shown in following table 1.

[table 1]

Solenoid valve		The signal pressure of second switch valve			Shelves speed
Solenoid valve		The signal pressure of second switch valve				??SS1	??SS2	??120	??122	????118
Open	Open	??×	??○	????×		??SS1	??SS2	??120	??122	????118	????D3，D4，D5， ????3_1，3_4，3_5，4_5
Open	Open	??×	??○	????×	Open	Disconnected	??×	??×	????×	????2_3，5_6	????D3，D4，D5， ????3_1，3_4，3_5，4_5
Disconnected	Disconnected	??○	??×	????×	Open	Disconnected	??×	??×	????×	????2_3，5_6	????D1，D2，D4，D6 ????N_D，1_2，2_4，4_6
Disconnected	Disconnected	??○	??×	????×	Disconnected	Open	??×	??×	????○	????L1_L2，L2_L3，L1_L3	????D1，D2，D4，D6 ????N_D，1_2，2_4，4_6

As shown in table 1, the first and second solenoid valve SS1 and SS2 are disconnected when intermediateness N.In this case, with reference to Fig. 4, first and

second switch valves

42 and 44 all do not receive from the pilot pressure of their

first port

90 and 110 and receive from their

second port

92 and 112 pilot pressure.

Therefore, with regard to first switch valve 42, move on the left side of its spool in figure, thereby the hydraulic pressure by the input of the 3rd port 94 is output and is transported to second switch valve 44 through the 3rd port one 14 through the 4th port 96.

With regard to second switch valve 44, move on its spool the right in figure.Like this, the hydraulic pressure by 14 inputs of the 3rd port one is output and is transported in the 3rd switch valve 46 through second port one 42 through the 6th port one 20.Therefore the spool of the 3rd switch valve 46 is shifted to the right of figure.

In this case, close because the five-port 148 of the 3rd switch valve 46 becomes, therefore the hydraulic pressure through five-port 148 places that pressure line 84 is imported becomes stable.

With regard to the 4th switch valve 48, because line pressure is transported to the 4th switch valve 48 through first port one 70, spool moves to the right of figure, and therefore five-port 178 communicates with the 6th port one 80.

The pressure that is reduced of reduction valve 38 is continued transported to first to the 4th task control solenoid valve DS1-DS4,

switch valve

50,54,62 and 68, pressure controlled

valve

52,56,64 and 70 as their pilot pressure.

When driver moves to the D scope with hand control valve 40, for example when the startup of automobile, the pressure of D scope (forward gears pressure) is transported to first and three-clutch side

pressure control valve

52 and 56 through forward gears pressure line 84, and this pressure also is transported to the second break side pressure control valve 70 through the 4th switch valve 48 from the 4th port 478 simultaneously.

The transmission control unit (not shown) begins first task control electromagnetic valve DS1 is carried out the task control startup now.

In this case, as shown in Figure 5, the role pressure of first task control electromagnetic valve DS1 is transported to first clutch side pressure control valve 52 through second port 224.Therefore, thereby the spool of pressure controlled valve 52 that once is moved to the right of figure under by the effect from the pilot pressure of the 3rd port 226 begins to moving to left the 4th port 228 to be communicated with five-port 230 lentamente, so D scope pressure becomes to first clutch C1 and carries.

Simultaneously, the role pressure of first task control electromagnetic valve DS1 also is transported to first clutch side switch valve 50 through first port 200, and therefore, the spool of switch valve 50 is shifted to the left side among the figure.

Therefore be output being transported to first clutch side pressure control valve 52 through the 4th port 206 from the line pressure of the 3rd port 204 inputs, and therefore act on the cup 220 (and causing spool) and move to the left side of figure further through first port 222.Like this, high operation pressure is transported to first clutch C1 and to the gear shift of finishing first forward gears.

When car speed quickened with one grade, transmission control unit began the 4th task control solenoid valve DS4 is carried out task control (referring to Fig. 8).

In this case, the role pressure of the 4th task control solenoid valve DS4 is transported to the second break side pressure control valve 70 through second port 474.Therefore; once the spool that is moved to the pressure controlled valve 70 on the right among the figure in the effect from the pilot pressure of the 3rd port 476 began to move to left lentamente the 4th port 478 is communicated with five-port 480, and therefore the stable hydraulic pressure in the 4th port 478 places begins to be transported to the second break side error protection valve, 74 places through five-port 480 outputs and through second port 522.

Because the spool of the second break side error protection valve 74 is shifted to the left side the figure under the effect of the line pressure of importing from first port 520; hydraulic pressure through the input of second port 522 is output through the 3rd port 524, and this hydraulic pressure operation pressure that will be used as the second break B2 is transported to the second break B2 then.

Simultaneously, the role pressure of the 4th task control solenoid valve DS4 also is imported into the second break side switch valve 68 through first port 450, and therefore, the spool of switch valve 68 moves on to the left side of figure.

Like this, from the line pressure of the 3rd port 454 input through 456 outputs of the 4th port to be transported to the second break side pressure control valve 70 through first port 472, this pressure acts on the float element 470 (and causing spool) and further moves on the left side in figure thus.Therefore high operation pressure is transported to the second break B2 and also is done to the gear shift of second forward gears.

The pilot pressure of the 4th task control solenoid valve DS4 also is transported in the six fast related switch valves 72 through second port 502, yet in the second forward gears D2, spool continues to left movement under the elastic force effect of elastic element 510.

When car speed quickened with second gear D2, transmission control unit stopped the task control of the 4th task control solenoid valve DS4 and begins the 3rd task control solenoid valve DS3 is carried out task control.

In this case, the first on/off solenoid valve SS1 gear shift begin be opened, the second on/off solenoid valve SS2 is opened when the end of gear shift then.

Therefore, because the variation of the second break side error protection valve, 74 ports, the hydraulic pressure that has been transported to the second break B2 is discharged through the 4th port 526 now.

With regard to first switch valve 42, according to opening of the first on/off solenoid valve SS1, move on its spool the right in figure, and therefore the hydraulic pressure that is transfused to through the 3rd port 94 is output by five-port 98, and is transported to second switch valve 44 through the 4th port one 16.Yet because second switch valve 44 is still by task control, therefore the hydraulic pressure at the 4th port one 16 places is stable.

With regard to the 3rd switch valve 46, because pilot pressure is not transported to second port one 42, so its spool is arranged in the left side of figure.Like this, be output and be imported into second clutch side hydraulic pressure control valve 64 (see figure 7)s through the 6th port one 50 through the hydraulic pressure of five-port 148 input through the 4th port 378.

At this moment, the role pressure of the 3rd task control solenoid valve DS3 is transported to second clutch side pressure control valve 64 through second port 374.Therefore; begin to move to left lentamente the 4th port 378 and five-port 380 are communicated with to such an extent as to once under effect, be moved to the spool of the pressure controlled valve 64 on the right among the figure, thereby be output to be transported to second clutch side error protection valve 66 through second port 402 through five-port 380 from the hydraulic pressure of the 4th port 378 from the pilot pressure of the 3rd port 376.

Because the spool of second clutch side error protection valve 66 is in the left side of shifting under the line pressure effect of first port 400 among the figure; therefore the hydraulic pressure through 402 inputs of second port is output through the 3rd port 404, to be transported among the second clutch C2 as the operation pressure among the second clutch C2.

Simultaneously, the role pressure of the 3rd task control solenoid valve DS3 also is transported in the second clutch side switch valve 62 through first port 350, and therefore, move on the left side of the spool of switch valve 62 in figure.

Like this, be output to be transported to second clutch side pressure control valve 64 through first port 372 through the 4th port 356 from the line pressure of the 3rd port 354 inputs, (and causing spool) further moves on the left side in figure thereby this pressure makes float element 370.Therefore, high operation pressure is transported to that the gear shift to the 3rd forward gears D3 simultaneously is done among the second clutch C2.

When the gear shift to third gear was done, the second on/off solenoid valve SS2 was opened, so the spool of second switch valve 44 moves to the left side among the figure.The hydraulic pressure that so has been stabilized in the 4th port one 16 places begins through 22 outputs of the 7th port one so that be transported to the 4th switch valve 48 through second port one 72.Like this, the 4th switch valve 48 fully will be transported to the D scope pressure cut off of the second break side pressure control valve 70 and discharge the pressure (referring to Fig. 4) in the 4th switch valve 48 downstream sides by the 7th port one 82.

When car speed increased with third gear D3, transmission control unit cut off the task control of the 3rd task control solenoid valve DS3 and begins the second task control solenoid valve DS2 is carried out task control.

The hydraulic pressure that is transported to second clutch C2 then is discharged from, and is imported into three-clutch side pressure control valve 56 (referring to Fig. 6) according to the role pressure of the task control of the second task control solenoid valve DS2 through second port 264.

Like this; move to left lentamente the 4th port 268 is communicated with five-port 270 to such an extent as to once under effect, be moved to the spool of the pressure controlled valve 56 on the right, thereby the hydraulic pressure of importing from the 4th port 268 is output down to being transported to three-clutch side error protection valve 58 through the 4th port 296 through five-port 270 from the pilot pressure of the 3rd port 266.

Because the spool of three-clutch side error protection valve 58 is moved toward the left side of figure under the control of the line pressure of importing through first port 290, to such an extent as to therefore the hydraulic pressure that is transfused to through the 4th port 296 is transported to three-clutch C3 through the operation pressure that five-port 298 is output as three-clutch C3.

Simultaneously, the role pressure of the second task control solenoid valve DS2 also is transported in the three-clutch side switch valve 54 through first port 240, and therefore, the spool of switch valve 54 moves to the left side of figure.

Like this, be output through the 4th port 256 by the line pressure of the 3rd port 244 input so that be transported to three-clutch side pressure control valve 56, so this pressure acts on, and (and causing spool) further moves it on the float element 260 to the left side of figure through first port 262.Like this, high operation pressure is transported to three-clutch C3 and is done to the gear shift of the 4th forward gears D4.

When automobile quickened with fourth gear D4, the speed Control unit stopped that first task control electromagnetic valve DS1 is carried out task control and begins simultaneously the 3rd task control solenoid valve DS3 is carried out task control.

The hydraulic pressure that is transported to first clutch C1 then is discharged, and is transported to second clutch side pressure control valve 64 (referring to Fig. 7) according to the role pressure of the task control of the 3rd task control solenoid valve DS3 through second port 374.

Like this; thereby once the spool of the pressure controlled valve 64 that moves right under the effect from the pilot pressure of the 3rd port 376 began slowly to be moved to the left the 4th port 378 and five-port 380 was communicated with, and therefore was output so that be transported to the second clutch side from error protection valve 66 through second port 402 through five-port 380 by the hydraulic pressure of the 4th port 378 inputs.

Because the spool of second clutch side error protection valve 66 moves down into the left side among the figure in the effect of the line pressure of importing through first port 400, therefore the hydraulic pressure of importing through second port 402 is output down to the operation pressure as second clutch C2 by the 3rd port 404 and is transported to second clutch C2.

Simultaneously, the role pressure of the 3rd task control solenoid valve DS3 also is transported to second clutch side switch valve 62 places through first port 350, and therefore, the spool of switch valve 62 moves to the left side of figure.

Like this, be output through the 4th port 356 by the line pressure of the 3rd port 354 input so that be transported to second clutch side pressure control valve 64, and this pressure acts on float element 370 (and causing spool) it is moved to the left side of figure further thus through first port 372.Like this, high operation pressure is transported to second clutch C2 and is done to the gear shift of the 5th forward gears D5.

When automobile quickened with five grades of D5, transmission control unit stopped the 3rd task control solenoid valve DS3 is carried out task control and begin the 4th task control solenoid valve DS4 is carried out task control.

According to the task control of the 4th task control solenoid valve DS4, role pressure is transported to the second break side pressure control valve 70 (referring to Fig. 8) through second port 474 then.

Like this; once the spool that moves down among the figure task control valve 70 on the right in the pilot pressure effect from the 3rd port 476 began lentamente to moving to left so that the 4th port 478 is communicated with five-port 480, thereby the hydraulic pressure that is stabilized in the 4th port 478 places begins to export down to being transported to the second break side error protection valve 74 through second port 522 through five-port 480.

Because the spool of the second break side error protection valve 74 moves to the left side of figure under the effect of the line pressure of first port 520 input, therefore through the hydraulic pressure of second port, 522 inputs through 524 outputs of the 4th port so that be transported to the second break C2 as the operation pressure of the second break C2.

The role pressure of the 4th task control solenoid valve DS4 also is transported to the second break side switch valve 68 through first port 450 simultaneously, and therefore, the spool of switch valve 68 moves to the left side of figure.

Like this, the line pressure of being imported by the 3rd port 454 is output down to being transported to the second break side pressure control valve 70 and acting on float element 470 (and causing spool) thus by first port 472 through the 4th port 456 it is further moved to the left side of figure.Like this, high operation pressure is transported to the second break B2 and also is done to the gear shift of the 6th forward gears D6.

At this moment, the pilot pressure of the 4th task control solenoid valve DS4 also is transported to six fast related switch valves 72 through second port 502.Because the operation pressure of three-clutch C3 is used as pilot pressure and also is transported to six fast related switch valves 72 through first port 500, therefore the spool of six fast related switch valves 72 moves to the right of figure.

Like this, the hydraulic pressure that is transported to second port 502 is transported to the second break side pressure control valve 70 through the 7th port 484.Therefore, the spool of the second break side pressure control valve 70 that has been moved to the left side of figure fully moves right.Thereby the hydraulic pressure that the opening area of the 4th port 478 was reduced and therefore was transported to the second break B2 also is reduced.

In reverse gear, reverse gear pressure directly is transported to the first break B1 from hand control valve 40 through reverse gear pressure line 82, and the 3rd task control solenoid valve DS3 is subjected to task control.

Therefore, second clutch C2 receive described with third gear and five grades of hydraulic pressures that D3 is relevant with D5, and the gear shift that forwards reverse gear to is done.

According to the hydraulic control system of the present invention in the dynamical system of six gear transmissions that are applied to having five friction members, initial in gear shift, being transported to each hydraulic pressure that is used for the friction member of the fast receiver of each grade is controlled by pressure controlled valve, therefore, the control accuracy of friction member is enhanced.

In addition, with regard to simultaneously with regard to the operating element of bottom gear D3 and top gear D6 operation, the hydraulic pressure that is transported to these operating elements is by an independent switch valve decompression, and therefore, these operating elements can both receive required hydraulic pressure torque optimum under the situation of bottom gear and top gear.So the gear shift that the control accuracy of these operating elements is enhanced and brings thus vibration also reaches minimum.In addition, the drivability of automobile and fuel mileage number have also increased.

When in conjunction with when being considered to have most practicality and optimum embodiment at present present invention is described, it should be understood that the present invention is not limited to these the disclosed embodiments, but, the objective of the invention is to cover various improvement that are included within the dependent claims rotation spirit and scope and the layout that is equal to antithesis.

Claims

1. a hydraulic control system that is used for six gear transmissions of automobile is characterized in that, comprising:

The line pressure controlling component, it is stably kept from the hydraulic pressure of oil pump conveying and according to drive condition and changes line pressure;

Start controlling component, be used to control the rising and the control damping clutch of torque-converters moment;

The decompression controlling component is used to reduce line pressure and the line pressure that will reduce is exported as pilot pressure;

The on-off valve control member made, these parts comprise the hand control valve that changes hydraulic line according to manual operations, first switch valve by the line pressure and the first on/off electromagnetic valve, by the second switch valve of the line pressure and the second on/off electromagnetic valve with by line pressure with from third and fourth switch valve of the pilot pressure control of second switch valve;

First clutch controlling component, these parts comprise first clutch side switch valve and the first clutch side pressure control valve by the control of first task control electromagnetic valve, so that the operation pressure of first clutch controlling component control first clutch;

The B1/C3 controlling component, these parts comprise by the three-clutch side switch valve of the second task control electromagnetic valve and three-clutch side pressure control valve, to supplying with the control valve of changing from the hydraulic line of the hydraulic pressure of three-clutch side pressure control valve and will supplying to first break from the hydraulic pressure that this control valve receives and carry out the first break side error protection valve of failure protection function;

The second clutch controlling component, these parts comprise by the second clutch side switch valve of the 3rd task control electromagnetic valve and second clutch side pressure control valve and the hydraulic pressure that will be received from the second break side pressure control valve and are transported to second clutch and carry out the second clutch side error protection valve of failure protection function; With

The B2 controlling component; these parts comprise by the second break side switch valve of the 4th task control electromagnetic valve and the second break side pressure control valve; under the control of the operation pressure of three-clutch; the hydraulic pressure that the hydraulic pressure that is received from the 4th task control solenoid valve is transported to six fast related switch valves of the second break side pressure control valve as pilot pressure and will be received from the second break side pressure control valve is transported to second break and carries out the second break side error protection valve of failure protection function.

2. hydraulic control system as claimed in claim 1 is characterized in that hand control valve comprises:

Be connected to the hydraulic system operation pressure pipeline on the modulating valve;

In reverse gear, be used to carry the reverse gear pressure line of reverse gear pressure; With

In forward gears, be used to carry the forward gears pressure line of forward gears pressure.

3. hydraulic control system as claimed in claim 1 is characterized in that, first switch valve comprises a valve body and a spool,

Wherein the valve body of first switch valve comprises:

The 3rd port of receiving tube linear pressure; With

With an arranged at predetermined intervals, the hydraulic pressure that is used for receiving through first port optionally is transported to the 4th and five-port of two ports of second switch valve; And

The spool of first switch valve comprises:

Receive the first step of pilot pressure by first port;

Optionally with the second step of five-port with the floss hole connection;

Cooperate the 3rd step that optionally the 3rd port is communicated with five-port with second step; With

Receive pilot pressure by second port, and be used for cooperating and optionally the 3rd port be communicated with the 4th port, and be used for the 4th step that optionally the 4th port is communicated with floss hole with the 3rd step.

4. hydraulic control system as claimed in claim 1 is characterized in that, the second switch valve comprises a valve body and a spool,

Wherein the valve body of second switch valve comprises:

Relative with first port, be used to receive second port as the line pressure of pilot pressure;

Reception is from the 3rd port of the hydraulic pressure of the 4th port of first switch valve;

Reception is from the 4th port of the hydraulic pressure of the five-port of first switch valve;

The hydraulic pressure of the 4th port is transported to the 7th port of the 4th switch valve as pilot pressure, and

The spool of second switch valve comprises:

Receive the first step of pilot pressure by first port;

The second step that five-port is communicated with floss hole optionally;

The 3rd step that the 3rd port is communicated with the 5th and the 6th port optionally; With,

Cooperate with the 3rd step, be used for the 4th step that optionally the 6th port is communicated with floss hole; With,

Cooperate with the 4th step, be used for the 5th step that optionally the 4th port is communicated with the 7th port.

5. hydraulic control system as claimed in claim 1 is characterized in that, the 3rd switch valve comprises a valve body and a spool,

The valve body of the 3rd switch valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Relative with first port, be used to receive second port from the pilot pressure of second switch valve:

Adjacent with second port, be used to receive the 3rd port as the operation pressure of the first clutch of pilot pressure;

Adjacent with the 3rd port, be used to receive the 4th port as the operation pressure of the three-clutch of pilot pressure;

The receiving tube linear pressure is as the five-port of source pressure;

Be used for optionally the hydraulic pressure of five-port being supplied to the 6th port of second clutch side pressure control valve; With,

The 7th port of the hydraulic pressure of the 6th port output has been passed through in discharging, and

Wherein the spool of the 3rd switch valve comprises:

Receive the first step of pilot pressure by first port;

The second step that the 6th port is communicated with the 7th port optionally;

The 3rd step that five-port is communicated with the 6th port optionally;

Receive the 4th step of pilot pressure by the 4th port;

By the 5th step of the 3rd port reception pilot pressure,

Wherein the side at the 5th step is provided with an elastic element.

6. hydraulic control system as claimed in claim 1 is characterized in that, the 4th switch valve comprises a valve body and a spool,

Wherein the valve body of the 4th switch valve comprises:

Reception is as first port of the line pressure of pilot pressure;

With the first port positioned opposite, be used to receive second port from the pilot pressure of second switch valve;

The receiving tube linear pressure is as the five-port of source pressure;

Optionally the hydraulic pressure of five-port is transported to the 6th port of the second break side pressure control valve; With

The spool of the 4th switch valve comprises:

Receive first step by the pilot pressure of first port;

The second step that the 6th port is communicated with the 7th port optionally;

The 3rd step that five-port is communicated with the 6th port optionally;

Receive the 4th step by the pilot pressure of the 4th port; With

Receive the 5th step by the pilot pressure of the 3rd port,

Wherein the side at the 5th step is provided with an elastic element.

7. hydraulic control system as claimed in claim 1 is characterized in that, first clutch side switch valve comprises a valve body and a spool,

Wherein the valve body of first clutch side switch valve comprises:

Reception is as the 3rd port of the line pressure of source pressure; With

The hydraulic pressure of the 3rd port is transported to the 4th port of first clutch side pressure control valve, and

The spool of first clutch side switch valve comprises:

Receive first step by the pilot pressure of first port; With

Receive the pilot pressure by second port and cooperate optionally the second step that the 3rd port and the 4th port are communicated with first step,

Wherein the side at first step is provided with an elastic element.

8. hydraulic control system as claimed in claim 1 is characterized in that, first clutch side pressure control valve comprises a valve body, a spool and a cup that keeps the spool mobile position safely that is positioned at valve body,

Wherein the valve body of first clutch side pressure control valve comprises:

The spool of first clutch side pressure control valve comprises:

Reception is by the pilot pressure of second port input and the first step of optionally the 6th port being opened; With

Receive by the pilot pressure of the 3rd port and the second step that optionally the 4th port is communicated with five-port with the first step cooperation,

9. hydraulic control system as claimed in claim 1 is characterized in that, three-clutch side switch valve comprises a valve body and a spool,

Wherein the valve body of three-clutch side switch valve comprises:

Reception is as the 3rd port of the line pressure of source pressure; With

The hydraulic pressure of the 3rd port is transported to the 4th port of three-clutch side pressure control valve, and

The spool of three-clutch side switch valve comprises:

Receive first step by the pilot pressure of first port; With

Receive by the pilot pressure of second port and with first step and cooperate the second step that optionally the 3rd port is communicated with the 4th port;

Wherein the side at first step is provided with an elastic element.

10. hydraulic control system as claimed in claim 1 is characterized in that three-clutch side pressure control valve comprises a valve body, a spool and a float element that keeps the spool mobile position safely that is positioned at valve body,

Wherein the valve body of three-clutch side pressure control valve comprises:

The spool of three-clutch side pressure control valve comprises:

Reception is by the pilot pressure of second port input and the first step of optionally the 6th port being opened;

Receive by the pilot pressure of the 3rd port and the second step that optionally the 4th port is communicated with five-port with the first step cooperation; With

Receive the 3rd step by the pilot pressure of the 3rd port input,

11. hydraulic control system as claimed in claim 1 is characterized in that, control valve comprises a valve body and a spool,

Wherein the valve body of control valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Optionally will be transported to the five-port of three-clutch by the hydraulic pressure of the 4th port input;

Between first port and the 4th port, be used for optionally discharging the 6th port of the hydraulic pressure that passes through five-port output;

The spool of control valve comprises:

Reception is by the pilot pressure of first port and the first step optionally the 6th port opened;

The second step that the 4th port and five-port are communicated with optionally;

The 3rd step that the 7th port is communicated with the 8th port optionally;

Receive the 4th step by the pilot pressure of the 3rd port; With

Receive the 5th step by the pilot pressure of second port.

12. hydraulic control system as claimed in claim 1 is characterized in that, the first break side error protection valve comprises a valve body and a spool,

Reception is as first port of the line pressure of pilot pressure;

Second port that is connected with the 7th port of control valve;

Reception is as the 8th port of the reverse gear pressure of pilot pressure, and

The spool of the first break side error protection valve comprises:

Receive first step by the pilot pressure of first port;

The second step adjacent with first step;

The 3rd step that the 3rd port is communicated with the second and the 4th port optionally;

Receive pilot pressure, and cooperate, optionally the 4th step that the 3rd port is communicated with the 4th port with the 3rd step by five-port;

Receive the 5th step by the pilot pressure of the 6th port;

Receive the 6th step by the pilot pressure of the 7th port; With

Receive the 7th step by the pilot pressure of the 8th port.

13. hydraulic control system as claimed in claim 1 is characterized in that, second clutch side switch valve comprises a valve body and a spool,

Wherein the valve body of second clutch side switch valve comprises:

Reception as the 3rd port of the line pressure of source pressure and

The hydraulic pressure of the 3rd port is transported to the 4th port of second clutch side pressure control valve, and

The spool of second clutch side switch valve comprises:

Receive first step by the pilot pressure of first port; With

Wherein there is a side of first step to be provided with an elastic element.

14. hydraulic control system as claimed in claim 1 is characterized in that, second clutch side pressure control valve comprises a valve body and a spool and a float element that is used for keeping safely the spool mobile position that is positioned at valve body,

Wherein the valve body of second clutch side pressure control valve comprises:

The spool of second clutch side pressure control valve comprises:

Reception is from the pilot pressure of second port input and the first step of optionally the 6th port being opened;

Receive the pilot pressure by the 3rd port and cooperate optionally the second step that the 4th port and five-port are communicated with first step; With

Receive the 5th step by the pilot pressure of the 3rd port input;

15. hydraulic control system as claimed in claim 1 is characterized in that, second clutch side error protection valve comprises a valve body and a spool,

Wherein the valve body of second clutch side error protection valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Reception is as the five-port of the operation pressure of the three-clutch of pilot pressure; With

Reception is as the 6th port of the operation pressure of the first clutch of pilot pressure, and

The spool of second clutch side error protection valve comprises:

Receive first step by the pilot pressure of first port;

The second step adjacent with first step;

Receive pilot pressure, and cooperate the 4th step that optionally the 3rd port is communicated with the 4th port with the 3rd step by five-port;

Receive the 5th step by the pilot pressure of the 6th port; With

16. hydraulic control system as claimed in claim 1 is characterized in that, the second break side switch valve comprises a valve body and a spool,

Wherein the valve body of the second break side switch valve comprises:

Reception is as the 3rd port of the line pressure of source pressure; With

The hydraulic pressure of the 3rd port is transported to the 4th port of the second break side pressure control valve, and

The spool of the second break side switch valve comprises:

Receive first step by the pilot pressure of first port; With

Wherein the side at first step is provided with an elastic element.

17. hydraulic control system as claimed in claim 1 is characterized in that, the second break side control valve comprises a valve body, a spool and a float element that keeps the spool mobile position safely that is positioned at valve body,

The hydraulic pressure of the 4th port is transported to the five-port of the second break side error protection valve;

Reception is from the 7th port of the pilot pressure of six fast related switch valves, and

The spool of the second break side pressure control valve comprises:

The pilot pressure and the first step that receive by the 3rd port cooperate the second step that optionally the 4th port is communicated with five-port;

18. hydraulic control system as claimed in claim 1 is characterized in that, six fast related switch valves comprise a valve body and a spool,

The valve body of six fast related switch valves comprises:

To be transported to the 3rd port of the second break side pressure control valve as its pilot pressure from the hydraulic pressure of second port input, and

The spool of six fast related switch valves comprises:

Receive first step by the pilot pressure of first port; With

The second step that second port is communicated with the 3rd port optionally,

Wherein the side at second step is provided with an elastic element.

19. hydraulic control system as claimed in claim 1 is characterized in that, the second break side error protection valve comprises a valve body and a spool,

The valve body of the second break side error protection valve comprises:

Reception is as first port of the line pressure of pilot pressure;

Wherein the spool of the second break side error protection valve comprises:

Receive first step by the pilot pressure of first port;

The second step adjacent with first step;

Reception is by the pilot pressure of five-port and the 4th step that matches and optionally the 3rd port is communicated with the 4th port with the 3rd step;

Receive the 5th step by the pilot pressure of the 6th port;

Receive the 6th step by the pilot pressure of the 7th port; With

Receive the 7th step by the pilot pressure of the 8th port.